核磁共振测井T_(2cutoff)确定方法探讨

On T_(2cutoff) Value Determination of Nuclear Magnetic Resonance Logging.

目前核磁共振测井应用的困难之一是 T2 cutoff确定问题。 T2 cutoff是测井解释中最基本的解释参数。核磁共振实验是确定 T2 cutoff的基本手段 ,但在实际应用中限于各种条件和具体情况需要研究其它的可替代办法。为此 ,在束缚水饱和度确定方法的基础上 ,探讨了 T2 cutoff的确定方法 ,并被核磁共振实验结果证明了其可行性。

It is now a tough problem to determine T 2cutoff value of nuclear magnetic resonance logging. The value is an essential parameter in NMR log interpretation. The basic method for determining T 2cutoff is nuclear magnetic resonance experiment, but it is necessary to find other feasible and economic methods in practice because of different conditions and concrete situations. Therefore, based on the irreducible water saturation determination methods, the T 2cutoff value determination is studied, which is confirmed feasible by available nuclear magnetic resonance experiment results.